EUVD-2026-73704
GHSA-g947-q8fx-hh3f
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only heap overflow (AV:L) requires an existing account (PR:L) and reliable heap-shaping conditions (AC:H); full system compromise upon success justifies C:H/I:H/A:H.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Online Certificate Status Protocol (OCSP) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Online Certificate Status Protocol (OCSP) component allows a locally authenticated attacker to elevate privileges to SYSTEM on affected Windows Server and Windows 10 systems. The vulnerability spans a wide range of Microsoft platforms from Windows Server 2012 through Windows Server 2025, with Microsoft patching confirmed via MSRC. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local authenticated account on the target Windows system - the CVSS vector AV:L/PR:L explicitly precludes unauthenticated or remote exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.0 with vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H reflects a meaningful but operationally constrained risk: local access with an existing account is required, and High attack complexity indicates that reliable exploitation likely demands heap-layout engineering - repeated allocation/deallocation cycles or timing-sensitive conditions - before the overflow can be weaponized. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply Microsoft's security update as the primary remediation, targeting the following fixed builds confirmed by EUVD affected-version data: Windows Server 2012/Server Core to 6.2.9200.26349; Windows Server 2012 R2/Server Core to 6.3.9600.23397; Windows Server 2016 and Windows 10 1607 to 10.0.14393.9512; Windows Server 2019 and Windows 10 1809 to 10.0.17763.9245; Windows Server 2022 to 10.0.20348.5622; Windows Server 2025 to 10.0.26100.33438. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server instances (2012 through 2025) and Windows 10 systems across your infrastructure to establish scope. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today